Loader for lumber-trimmers.



H. s. MITCHELL.

LOADER FOR LUMBER TRIMMERS.

APPLICATION FILED JAN-30.1914.

1,246, 1 38 Patented Nov. 13, 1917.

v UNITED STATES PATENT OFFICE.

HENRY S. MITCHELL, OF WAIINA, OREGON.

LOADER FOR LUMBER-TRIMMERS.

Specification of Letters Patent.

Patented Nov.- 13, 1917.

Application filed January 30, 1914. Serial lilo. 815,537.

To all whom it may concern Be it known that I, HENRY S. MITCHELL, a citizen of the United States, residing at VVauna, in the county of Clatsop and State of Oregon, have invented certain new and useful Improvements in Loaders for Lumher-Trimmers, of which the following is a specification.

My invention pertains to loaders for lum ber trimmers, and has for its objectto provide a mechanical device which will receive lumber as it comes from the transfer in a mill and load it upon the trimmer table. A further object is to provide mechanism which will receive articles while in motion and invert them. A still further object is to provide mechanism to receive objects movmg on a carrier, invert them and deliver them to a receiver.

These and other objects will appear from a description of the drawing, in which- Figure 1 shows a longitudinal sectional view of a trimmer table and trimmer, with a transfer adjacent thereto and my improved loader disposed between, taken on the line AA of Fig. 2.

Fig. 2 is a plan view showing the transfer, loader and the trimmer, in place.

Describing the drawing in detail, 1 designates a main frame upon whichare placed the risers 2 for carrying the trimmer. This trimmer comprises the table 3 carrying a pulley shaft 4: at each end, over which travel conveyer belts 5,,for carrying lumber loaded thereon.

Disposed at intervals across the trimmer table are saws 6, each mounted on a, swinging frame and adapted to be swung into working position, in any well known manner.

At the right in Fig. 1 is shown a transfer or conveyor 7 which is constructed in the a usual manner, and adapted to convey lumber from the saw to position for loading upon the trimmer table.

In the usual trimming operations the lumber is conveyed from the transfer by hand, over skids, onto the trimmer table, involving much difficult labor;

, In my mechanical loader I have mounted a shaft 8 between the transfer and the trimmer, approximately in the same plane with the latter and closely adjacent the end thereof. This shaft extends the length of the trimmer table, and at intervals throughout its length is fixed an arm 9 whose length combination,

is such as to permit it to clear the transfer as the shaft is rotated. These arms are fixed 1n alinement and are adapted to be swung to the level of the transfer which is fixed in a plane somewhat above that of the adjacent end of the trimmer table. These arms will thus form means upon whichthe lumber can slide onto the table; or by a sudden movementof the arms to the position shown dotted at 9, the lumber may be inverted and dropped upon the table as at 10, whence it will be carried by the conveyors 5 to the saws 6. p

Upon the shaft 8 is fixed a crank 11, which is operatively connected with the air or steam cylinder 12, and which is controlled through the foot lever 13.

As shown in Fig. 1 the arms 9 are made in the form of an eccentric segment with the shorter side uppermost, the. eccentricity of the periphery increasing to the opposite side as at 9". In operation, the articles brought by the transfer, willbe delivered upon the loader.

The operator will determine which side of the article, such as a piece of lumber, it is desired to have uppermost. If the side presented is satisfactory, a properly controlled movement of the foot lever will raise the them by the transfer; and should the ar-- ticles become shifted from their parallelism to the end of the transfer as shown at 10 the force of the conveyors against said arms will move them into alinement.

Upon restoring the segment arms to down position said arms will immediately be re leased from contact with articles on the transfer, with their initial movement, because of the longer arms of the segments being placed at the lower sides.

Having thus described my invention, what I claim, is-

1. In a device for moving flat lumber, in two traveling conveyors mounted end to end at a space apart, means for driving them in the same direction, means for transferring and turning said lumber, piece by piece, from one conveyer to the other, said means comprising a shaft mounted between the ends of said conveyer, a plurality of segments mounted on said shaftsat a space apart and having straight registering supporting upper, edges adapted to receive said lumber from the end of one conveyer, and means for turning said shaft and said segments a partial turn to transfer and turn said lumber to the other conveyer, the curved portions of said segments moving upwardly in frontof the delivering conveyer and operating as a stop, substantially as described.

2. In a device for moving fiat lumber, in combination, two traveling conveyers mounted end to end at a space apart, means for driving them in the same direction, means for transferring and turning said lumber, piece by piece, from one conveyor to the other, said means comprising a shaft mounted between the ends of said conveyer, a plurality of eccentric segments mounted on said shaft at a space apart and having straight registering supporting upper edges adapted to receive said lumber from the end of one conveyer, and means for turning said shaft and said conveyer, the eccentrically curved portions of said segments moving upwardly in front of thecdelivering conveyer and operating to stop and move backwardly on the conveyer the next piece to be delivered, substantially as described.

In testimony whereof I afiix my signature in the presence of two witnesses.

HENRY s. MITCHELL.

Witnesses E. EARL FEIKE, HAZEL A. ARMSTRONG. 

